Fig. 371 shows the caecum of _Capra aegagrus_, the Bezoar goat, detached from the adjacent intestine, and illustrates the type of the ruminant pouch, of considerable length and caliber, without terminal reduction. The same parts in a preparation of _Boselaphus tragocamelus_, the nilghai, are shown in Fig. 372. [Illustration: FIG. 371.--_Capra aegagrus_, Bezoar goat. Ileo-colic junction and caecum, isolated; dried preparation. (Columbia University Museum, No. 194.)] [Illustration: FIG. 372.--_Boselaphus tragocamelus_, nilghai. Ileo-colic junction and caecum, isolated. (Columbia University, Study Collection.)] Fig. 373 shows the caecum and ileo-colic junction, together with the spiral coil of the colon, in _Bos indicus_, the zebu, and Fig. 374 the same structures with a typical example of the spiral colon from _Cervus sika_, the Japanese deer; Fig. 375 is taken from a preparation of the parts in a foetal sheep, while Fig. 376 shows the spiral colon isolated in _Oryx leucoryx_, the oryx. [Illustration: FIG. 373.--_Bos indicus_, zebu. Ileo-colic junction, caecum, and spiral colon. (Columbia University Museum, No. 676.)] [Illustration: FIG. 374.--_Cervus sika_, Japanese deer. Ileo-colic junction, caecum, and spiral colon. (Columbia University, Study Collection.)] [Illustration: FIG. 375.--_Oris aries foet_, foetal sheep. Ileo-colic junction, caecum, and spiral colon. (Columbia University Museum, No. 1379.)] [Illustration: FIG. 376.--_Oryx leucoryx_, oryx. Spiral colon, isolated. (Columbia University, Study Collection.)] 2. SUBORDER: PERISSODACTYLA. In the horse and the rhinoceros the caecum is very large and of uniform caliber. [Illustration: FIG. 377.--_Tapirus americanus_, American tapir. Ileo-colic junction, caecum, and colon. (Columbia University Museum, No. 624.)] In the American tapir (Fig. 377) the large caecum tapers at its extremity, to form a species of rudimentary appendix, resembling somewhat the corresponding structure in _Dicotyles_ (cf. Figs. 369 and 370). The proximal segment of the colon is bent on itself in the form of an extensive loop with closely adherent limbs, illustrating an early stage in the development of the ruminant spiral colon (cf. p. 233). 3. SUBORDER: HYRACOIDEA. This suborder is formed by the single family of the _Hyracidae_. In addition to their other isolated and puzzling structural peculiarities the members of this small group present a most unusual arrangement of the intestinal canal, which is unique among living mammalia. In addition to a large sacculated caecal pouch, situated in the usual position at the beginning of the colon, the large intestine is provided further on with two supplementary elongated pointed conical pouches (Fig. 378). [Illustration: FIG. 378.--_Hyrax syriacus_, hyrax or coney. Intestinal canal, with ileo-colic junction, proximal ileo-colic caecum, and distal paired colic caeca. (Columbia University, Study Collection.)]